Best security is in the scripts themselves, not some arbitrary third-party solution - that option will always be inferior. Even if you dont make any scripts yourself, make sure to look through them and fix any possible weakpoints. The general rule of thumb is “don’t trust the client with anything”, i.e. everything important or abusable needs to happen on the server and be passed to the client in a ready format.
Here are a few good topics to read on the matter: